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regdef.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1985 MIPS Computer Systems, Inc.
7  * Copyright (C) 1994, 95, 99, 2003 by Ralf Baechle
8  * Copyright (C) 1990 - 1992, 1999 Silicon Graphics, Inc.
9  * Copyright (C) 2011 Wind River Systems,
10  * written by Ralf Baechle <[email protected]>
11  */
12 #ifndef _ASM_REGDEF_H
13 #define _ASM_REGDEF_H
14 
15 #include <asm/sgidefs.h>
16 
17 #if _MIPS_SIM == _MIPS_SIM_ABI32
18 
19 /*
20  * Symbolic register names for 32 bit ABI
21  */
22 #define zero $0 /* wired zero */
23 #define AT $1 /* assembler temp - uppercase because of ".set at" */
24 #define v0 $2 /* return value */
25 #define v1 $3
26 #define a0 $4 /* argument registers */
27 #define a1 $5
28 #define a2 $6
29 #define a3 $7
30 #define t0 $8 /* caller saved */
31 #define t1 $9
32 #define t2 $10
33 #define t3 $11
34 #define t4 $12
35 #define ta0 $12
36 #define t5 $13
37 #define ta1 $13
38 #define t6 $14
39 #define ta2 $14
40 #define t7 $15
41 #define ta3 $15
42 #define s0 $16 /* callee saved */
43 #define s1 $17
44 #define s2 $18
45 #define s3 $19
46 #define s4 $20
47 #define s5 $21
48 #define s6 $22
49 #define s7 $23
50 #define t8 $24 /* caller saved */
51 #define t9 $25
52 #define jp $25 /* PIC jump register */
53 #define k0 $26 /* kernel scratch */
54 #define k1 $27
55 #define gp $28 /* global pointer */
56 #define sp $29 /* stack pointer */
57 #define fp $30 /* frame pointer */
58 #define s8 $30 /* same like fp! */
59 #define ra $31 /* return address */
60 
61 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
62 
63 #if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32
64 
65 #define zero $0 /* wired zero */
66 #define AT $at /* assembler temp - uppercase because of ".set at" */
67 #define v0 $2 /* return value - caller saved */
68 #define v1 $3
69 #define a0 $4 /* argument registers */
70 #define a1 $5
71 #define a2 $6
72 #define a3 $7
73 #define a4 $8 /* arg reg 64 bit; caller saved in 32 bit */
74 #define ta0 $8
75 #define a5 $9
76 #define ta1 $9
77 #define a6 $10
78 #define ta2 $10
79 #define a7 $11
80 #define ta3 $11
81 #define t0 $12 /* caller saved */
82 #define t1 $13
83 #define t2 $14
84 #define t3 $15
85 #define s0 $16 /* callee saved */
86 #define s1 $17
87 #define s2 $18
88 #define s3 $19
89 #define s4 $20
90 #define s5 $21
91 #define s6 $22
92 #define s7 $23
93 #define t8 $24 /* caller saved */
94 #define t9 $25 /* callee address for PIC/temp */
95 #define jp $25 /* PIC jump register */
96 #define k0 $26 /* kernel temporary */
97 #define k1 $27
98 #define gp $28 /* global pointer - caller saved for PIC */
99 #define sp $29 /* stack pointer */
100 #define fp $30 /* frame pointer */
101 #define s8 $30 /* callee saved */
102 #define ra $31 /* return address */
103 
104 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
105 
106 #endif /* _ASM_REGDEF_H */